import cv2
import numpy as np
img = cv2.imread('photo.png')
cv2.imshow('Input',img)
imgHSV = cv2.cvtColor(img,cv2.COLOR_BGR2HSV)
lower = np.array([[78],[43],[46]])
upper = np.array([[99],[255],[255]])
dst = cv2.inRange(imgHSV,lower,upper)
cv2.imshow('Output',dst)
cv2.waitKey()
cv2.destroyAllWindows()